Patent US2961777A successfully refreshed from Google Patents.
US2961777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the study and testing participants of a study problem and a method of making same
Assignee: Valkenburgh Nooger & Neville I
•
Filing: 1955-08-30
•
Granted: 1960-11-29
•
Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Richard S Neville
- 👤 Rosen Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:46
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |